To scale a 3D model in 3D design, use the software’s scaling tool (often labeled “Scale” or with a cube/arrow icon) to adjust its size proportionally or across individual axes.
Proportional scaling keeps the model’s shape consistent—e.g., increasing all dimensions by 50% equally. Non-proportional scaling lets you modify height, width, or depth separately for custom tweaks.
For accuracy (critical for 3D printing or fitting parts), use numerical inputs (percentages/measurements) instead of dragging handles. Preview changes first to avoid unintended distortions.